#define PRINT_CPU_WIDTH 4
#define PRINT_COUNT_WIDTH 9
#define PRINT_RUNTIME_WIDTH 10
+#define PRINT_LATENCY_WIDTH 10
#define PRINT_TIMESTAMP_WIDTH 17
#define PRINT_KWORK_NAME_WIDTH 30
#define RPINT_DECIMAL_WIDTH 3
#define PRINT_TIME_UNIT_SEC_WIDTH 2
#define PRINT_TIME_UNIT_MESC_WIDTH 3
#define PRINT_RUNTIME_HEADER_WIDTH (PRINT_RUNTIME_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
+#define PRINT_LATENCY_HEADER_WIDTH (PRINT_LATENCY_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
#define PRINT_TIMESTAMP_HEADER_WIDTH (PRINT_TIMESTAMP_WIDTH + PRINT_TIME_UNIT_SEC_WIDTH)
struct sort_dimension {
return 0;
}
+static int avg_latency_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ u64 avgl, avgr;
+
+ if (!r->nr_atoms)
+ return 1;
+ if (!l->nr_atoms)
+ return -1;
+
+ avgl = l->total_latency / l->nr_atoms;
+ avgr = r->total_latency / r->nr_atoms;
+
+ if (avgl > avgr)
+ return 1;
+ if (avgl < avgr)
+ return -1;
+
+ return 0;
+}
+
+static int max_latency_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ if (l->max_latency > r->max_latency)
+ return 1;
+ if (l->max_latency < r->max_latency)
+ return -1;
+
+ return 0;
+}
+
static int sort_dimension__add(struct perf_kwork *kwork __maybe_unused,
const char *tok, struct list_head *list)
{
.name = "count",
.cmp = count_cmp,
};
+ static struct sort_dimension avg_sort_dimension = {
+ .name = "avg",
+ .cmp = avg_latency_cmp,
+ };
struct sort_dimension *available_sorts[] = {
&id_sort_dimension,
&max_sort_dimension,
&count_sort_dimension,
&runtime_sort_dimension,
+ &avg_sort_dimension,
};
+ if (kwork->report == KWORK_REPORT_LATENCY)
+ max_sort_dimension.cmp = max_latency_cmp;
+
for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
if (!strcmp(available_sorts[i]->name, tok)) {
list_add_tail(&available_sorts[i]->list, list);
return 0;
}
+static void latency_update_entry_event(struct kwork_work *work,
+ struct kwork_atom *atom,
+ struct perf_sample *sample)
+{
+ u64 delta;
+ u64 entry_time = sample->time;
+ u64 raise_time = atom->time;
+
+ if ((raise_time != 0) && (entry_time >= raise_time)) {
+ delta = entry_time - raise_time;
+ if ((delta > work->max_latency) ||
+ (work->max_latency == 0)) {
+ work->max_latency = delta;
+ work->max_latency_start = raise_time;
+ work->max_latency_end = entry_time;
+ }
+ work->total_latency += delta;
+ work->nr_atoms++;
+ }
+}
+
+static int latency_raise_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ return work_push_atom(kwork, class, KWORK_TRACE_RAISE,
+ KWORK_TRACE_MAX, evsel, sample,
+ machine, NULL);
+}
+
+static int latency_entry_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct kwork_atom *atom = NULL;
+ struct kwork_work *work = NULL;
+
+ atom = work_pop_atom(kwork, class, KWORK_TRACE_ENTRY,
+ KWORK_TRACE_RAISE, evsel, sample,
+ machine, &work);
+ if (work == NULL)
+ return -1;
+
+ if (atom != NULL) {
+ latency_update_entry_event(work, atom, sample);
+ atom_del(atom);
+ }
+
+ return 0;
+}
+
static struct kwork_class kwork_irq;
static int process_irq_handler_entry_event(struct perf_tool *tool,
struct evsel *evsel,
int ret = 0;
char kwork_name[PRINT_KWORK_NAME_WIDTH];
char max_runtime_start[32], max_runtime_end[32];
+ char max_latency_start[32], max_latency_end[32];
printf(" ");
ret += printf(" %*.*f ms |",
PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
(double)work->total_runtime / NSEC_PER_MSEC);
+ } else if (kwork->report == KWORK_REPORT_LATENCY) { // avg delay
+ ret += printf(" %*.*f ms |",
+ PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)work->total_latency /
+ work->nr_atoms / NSEC_PER_MSEC);
}
/*
PRINT_TIMESTAMP_WIDTH, max_runtime_start,
PRINT_TIMESTAMP_WIDTH, max_runtime_end);
}
+ /*
+ * max delay, max delay start, max delay end
+ */
+ else if (kwork->report == KWORK_REPORT_LATENCY) {
+ timestamp__scnprintf_usec(work->max_latency_start,
+ max_latency_start,
+ sizeof(max_latency_start));
+ timestamp__scnprintf_usec(work->max_latency_end,
+ max_latency_end,
+ sizeof(max_latency_end));
+ ret += printf(" %*.*f ms | %*s s | %*s s |",
+ PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)work->max_latency / NSEC_PER_MSEC,
+ PRINT_TIMESTAMP_WIDTH, max_latency_start,
+ PRINT_TIMESTAMP_WIDTH, max_latency_end);
+ }
printf("\n");
return ret;
if (kwork->report == KWORK_REPORT_RUNTIME) {
ret += printf(" %-*s |",
PRINT_RUNTIME_HEADER_WIDTH, "Total Runtime");
+ } else if (kwork->report == KWORK_REPORT_LATENCY) {
+ ret += printf(" %-*s |",
+ PRINT_LATENCY_HEADER_WIDTH, "Avg delay");
}
ret += printf(" %-*s |", PRINT_COUNT_WIDTH, "Count");
PRINT_RUNTIME_HEADER_WIDTH, "Max runtime",
PRINT_TIMESTAMP_HEADER_WIDTH, "Max runtime start",
PRINT_TIMESTAMP_HEADER_WIDTH, "Max runtime end");
+ } else if (kwork->report == KWORK_REPORT_LATENCY) {
+ ret += printf(" %-*s | %-*s | %-*s |",
+ PRINT_LATENCY_HEADER_WIDTH, "Max delay",
+ PRINT_TIMESTAMP_HEADER_WIDTH, "Max delay start",
+ PRINT_TIMESTAMP_HEADER_WIDTH, "Max delay end");
}
printf("\n");
{
int i;
const char *const kwork_event_str[] = {
+ [KWORK_TRACE_RAISE] = "raise",
[KWORK_TRACE_ENTRY] = "entry",
[KWORK_TRACE_EXIT] = "exit",
};
.entry_event = report_entry_event,
.exit_event = report_exit_event,
};
+ static struct trace_kwork_handler latency_ops = {
+ .raise_event = latency_raise_event,
+ .entry_event = latency_entry_event,
+ };
switch (kwork->report) {
case KWORK_REPORT_RUNTIME:
kwork->tp_handler = &report_ops;
break;
+ case KWORK_REPORT_LATENCY:
+ kwork->tp_handler = &latency_ops;
+ break;
default:
pr_debug("Invalid report type %d\n", kwork->report);
return -1;
.nr_skipped_events = { 0 },
};
static const char default_report_sort_order[] = "runtime, max, count";
+ static const char default_latency_sort_order[] = "avg, max, count";
const struct option kwork_options[] = {
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
"Show summary with statistics"),
OPT_PARENT(kwork_options)
};
+ const struct option latency_options[] = {
+ OPT_STRING('s', "sort", &kwork.sort_order, "key[,key2...]",
+ "sort by key(s): avg, max, count"),
+ OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+ "list of cpus to profile"),
+ OPT_STRING('n', "name", &kwork.profile_name, "name",
+ "event name to profile"),
+ OPT_STRING(0, "time", &kwork.time_str, "str",
+ "Time span for analysis (start,stop)"),
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+ OPT_PARENT(kwork_options)
+ };
const char *kwork_usage[] = {
NULL,
NULL
"perf kwork report [<options>]",
NULL
};
+ const char * const latency_usage[] = {
+ "perf kwork latency [<options>]",
+ NULL
+ };
const char *const kwork_subcommands[] = {
- "record", "report", NULL
+ "record", "report", "latency", NULL
};
argc = parse_options_subcommand(argc, argv, kwork_options,
kwork.report = KWORK_REPORT_RUNTIME;
setup_sorting(&kwork, report_options, report_usage);
return perf_kwork__report(&kwork);
+ } else if (strlen(argv[0]) > 2 && strstarts("latency", argv[0])) {
+ kwork.sort_order = default_latency_sort_order;
+ if (argc > 1) {
+ argc = parse_options(argc, argv, latency_options, latency_usage, 0);
+ if (argc)
+ usage_with_options(latency_usage, latency_options);
+ }
+ kwork.report = KWORK_REPORT_LATENCY;
+ setup_sorting(&kwork, latency_options, latency_usage);
+ return perf_kwork__report(&kwork);
} else
usage_with_options(kwork_usage, kwork_options);
projects / platform / kernel / linux-rpi.git / commitdiff